Generated by Spark: Add custom 404 page design with helpful navigation links

src/components/NotFoundPage.tsx

@@ -0,0 +1,115 @@
+import { useNavigate } from 'react-router-dom'
+import { Button } from '@/components/ui/button'
+import { Card } from '@/components/ui/card'
+import { 
+  House, 
+  ArrowLeft, 
+  MagnifyingGlass, 
+  Compass,
+  Code,
+  Cube,
+  Lightning,
+  ChartBar
+} from '@phosphor-icons/react'
+
+export function NotFoundPage() {
+  const navigate = useNavigate()
+
+  const quickLinks = [
+    { label: 'Dashboard', icon: ChartBar, path: '/dashboard', description: 'Project overview and stats' },
+    { label: 'Code Editor', icon: Code, path: '/code', description: 'Edit your source files' },
+    { label: 'Components', icon: Lightning, path: '/components', description: 'UI component library' },
+    { label: 'Models', icon: Cube, path: '/models', description: 'Data models and schemas' },
+  ]
+
+  return (
+    <div className="h-full w-full flex items-center justify-center bg-gradient-to-br from-background via-background to-muted/20 p-6">
+      <div className="max-w-3xl w-full space-y-8">
+        <div className="text-center space-y-4">
+          <div className="inline-flex items-center justify-center w-32 h-32 rounded-full bg-gradient-to-br from-primary/20 to-accent/20 backdrop-blur-sm mb-4">
+            <Compass className="text-primary" size={64} weight="duotone" />
+          </div>
+          
+          <h1 className="text-6xl font-bold text-foreground">404</h1>
+          <h2 className="text-2xl font-semibold text-foreground">Page Not Found</h2>
+          <p className="text-muted-foreground max-w-md mx-auto">
+            The page you're looking for doesn't exist or may have been moved.
+          </p>
+        </div>
+
+        <div className="flex flex-wrap gap-4 justify-center">
+          <Button
+            onClick={() => navigate(-1)}
+            variant="outline"
+            size="lg"
+            className="gap-2"
+          >
+            <ArrowLeft />
+            Go Back
+          </Button>
+          
+          <Button
+            onClick={() => navigate('/')}
+            size="lg"
+            className="gap-2"
+          >
+            <House />
+            Home
+          </Button>
+          
+          <Button
+            onClick={() => {
+              const searchBtn = document.querySelector('[data-search-trigger]') as HTMLElement
+              searchBtn?.click()
+            }}
+            variant="secondary"
+            size="lg"
+            className="gap-2"
+          >
+            <MagnifyingGlass />
+            Search
+          </Button>
+        </div>
+
+        <div className="space-y-3">
+          <h3 className="text-sm font-medium text-muted-foreground text-center">
+            Quick Links
+          </h3>
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4">
+            {quickLinks.map((link) => {
+              const Icon = link.icon
+              return (
+                <Card
+                  key={link.path}
+                  className="p-4 hover:bg-accent/50 transition-colors cursor-pointer group"
+                  onClick={() => navigate(link.path)}
+                >
+                  <div className="flex flex-col items-center text-center gap-3">
+                    <div className="w-12 h-12 rounded-lg bg-primary/10 flex items-center justify-center group-hover:bg-primary/20 transition-colors">
+                      <Icon className="text-primary" size={24} weight="duotone" />
+                    </div>
+                    <div>
+                      <h4 className="font-medium text-sm">{link.label}</h4>
+                      <p className="text-xs text-muted-foreground mt-1">
+                        {link.description}
+                      </p>
+                    </div>
+                  </div>
+                </Card>
+              )
+            })}
+          </div>
+        </div>
+
+        <div className="text-center">
+          <p className="text-xs text-muted-foreground">
+            Need help? Check the keyboard shortcuts with{' '}
+            <kbd className="px-2 py-1 rounded bg-muted text-xs font-mono">Ctrl</kbd>
+            {' + '}
+            <kbd className="px-2 py-1 rounded bg-muted text-xs font-mono">/</kbd>
+          </p>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/organisms/ToolbarActions.tsx

@@ -36,6 +36,7 @@ export function ToolbarActions({
         icon={<MagnifyingGlass size={18} />}
         label="Search (Ctrl+K)"
         onClick={onSearch}
+        data-search-trigger
       />
 
       {showErrorButton && errorCount > 0 && onShowErrors && (